Device for extracting bolts



(No Model.)

W. W. JOHNSON.

DEVICE FOR EXTRAGTING BOLTS.

No. 461,939. Patented 00t.27,1891.

UNITED STATES PATENT OFFICE.

VVILLIAW \VILLEY JOHNSON, OF BEEBE, ARKANSAS.

DEVICE FOR EXTRACTING BOLTS.

SPECIFICATION forming part of Letters Patent No. 461,939, dated October27, 1891.

Application filed April 29, 1891.

- State of Arkansas, have invented a new and useful Bolt-Extractor, ofwhich the following is a specification.

This invention relates to an improvement in bolt-extractors, the objectsin View being to provide a device for this purpose and also adapted tobe readily adjusted, whereby its capacity is not limited to a few sizes,but whereby the device may beadjusted so as to be capable of operatingupon a bolt of the largest size or a rod of fine wire.

A further object of the invention is to se cure the above advantages bysimple and inexpensive means.

Other objects and advantages of the invention will appear in thefollowing description, and the novel features thereof will beparticularly pointed out in the claims.

Referring to the drawings, Figure 1 is a perspective of a bolt-extractorconstructed in accordance with my invention. Fig. 2 is a verticallongitudinal section. Fig. 3 is a detail in perspective of thebolt-embracing link and its toothed adjusting-bars. Fig. 4 is atransverse section through the adj usting-bars and the stock of thedevice.

Like numerals of reference indicate like parts in all the figures of thedrawings.

The stock of the device is formed of metal, as is usual, and comprises arectangular body portion 1, which is reduced at its upper end and shapedto form a handle 2. At the opposite end of the stock a foot is provided,the same consisting of a curved toe 3, and in rear thereof abearing-heel 4:, from which the toe diverges. To the under side of thebody portion is securely riveted or othewise connected a U-shaped plate5, the side walls of which embrace the sides of the body portion and areprovided with a series of rearwardly-inclincd teeth 6. Above the plate 5there is secured by rivets or otherwise to the upper side of the bodyportion of the stock an inverted-U-shaped plate 7, the side walls ofwhich are located beyond the side walls 6 of the plate 5 and those ofthe stock, so that they combine with the latter to form inter- SerialNo. 391,172. (No model.)

mediate spaces or ways. Through the plate 7 pass set-screws 8, the innerends of which extend into the space or passage-ways just mentioned.

In the spaces or passage-ways there is located a pair of bars 9,slightly narrower than the height of the passageways and adapted forsliding therein. These bars are provided upon their under edges with aseries of forwardly disposed teeth 10, which may be thrown intoengagement at any portion of their length by means of the set-screws 8;

In this mannerthe bars may be adjusted, as will be readily understoodand apparent. The forward ends of the bars are perforated and areembraced by the rear recessed ends 11 of a U-shaped bail or link 12,said ends being pivoted to the bars by pivot-bolts 13, and the link whenpivoted in position, as shown, embracing the toe 3, to and from which itmay be adjusted by the adjustment of the bars 9.

The toe 3, it will be observed, is beveled, as indicated at 13, whilethe inner edge of the link is likewise beveled, though to a greaterdegree, as indicated at 14.

The operation of bolt-extractors of this class is so well known asto'require but little explanation, but may be briefly stated as follows:The size of the bolt is first approximated and the link set at a properdistance from the toe, so as to be readily introduced over the end ofthe bolt. It simply remains to elevate the handle 2, and, using the heel4 as a fulcrum, exert power upon the handle, when the toe engaging withthe bolt tightly clamps the same between itself and the link, and thebolt is thus elevated from its open- IIaving described my invention,what I claim is 1. In a bolt-extractor, the combination, with the stockterminating ina lower beveled end forming a foot and heel, of a linkpivotally and adj ustably connected to the stock, substantially asspecified.

2. In a bolt-extractor, the combination, with the stock provided atopposite sides with a series of teeth, of a pair of bars loosely-mounted for movement at opposite sides of the stock and having theirunder edges toothed to engage the teeth of the stock, the

Q-shaped link pivoted to the bars, and devlces for adjusting the teethof the bars into engagement with those of the stock, substantially asspecified.

3. In abolt-extractor, the combination, with the stock, rectangular incross-section, terminating at its upper end in a handle and at its lowerend in a diverging foot and heel, of a U-shaped plate secured to theunder side of the stock and having its sides toothed and embracing saidstock, the inverted-U -shaped plate secured to the stock and Wider thanthe same, combining therewith to form opposite ways, the opposite barsmounted in the Ways and having their under edges toothed in a directionopposite to those of the sides of the plate, the set-screws passingthrough the upper plate and impinging upon the bars, and the U-shapedlink beveled at its inner front edge and pivoted at its terminals to thefront ends of the bars, substantially as specified.

In testimony that I claim the foregoing as my ownI have hereto affixedmy signature in presence of two Witnesses.

WILLIAM WVILLEY JOHNSON.

Witnesses:

J. K. PIOKERING, M. O. MORRISON.

